- Description
- Specifications
Catalog #: CYT-376
Description:
Interleukin-18 Rat Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 158 amino acids and having a molecular mass of 18260 Dalton.
The IL-18 is purified by proprietary chromatographic techniques.
Synonyms:
Interferon-gamma-inducing factor, IGIF, IL-1g, IL-18, IL1F4, MGC12320, IFN-gamma-inducing factor, Interleukin-1 gamma, IL-1 gamma, Iboctadekin.
Source:
Escherichia Coli.
Amino Acid Sequence:
The sequence of the first five N-terminal amino acids was determined and was found to be His-Phe-Gly-Arg-Leu.
Purity:
Greater than 95.0% as determined by(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
Solubility:
It is recommended to reconstitute the lyophilized Interleukin 18 in sterile 18MΩ–cm H2O not less than 100 µg/ml, which can then be further diluted to other aqueous solutions.
Formulation:
Lyophilized from a concentrated (1mg/ml) solution in water containing 0.4 x PBS pH=7.2.
Stability:
Lyophilized Interleukin-18 although stable at room temperature for 3 weeks, should be stored desiccated below -18 °C. Upon reconstitution IL18 should be stored at 4 °C between 2-7 days and for future use below -18 °C.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.
Activity:
The ED50 as determined by the dose-dependant stimulation of IFN-gamma by murine lymph node cells (400,000cells/well) co-stimulated with sub optimal dose of ConA (0.75ug/ml) is 12ng/ml corresponding to a specific activity of 84,000U/mg. The medium was RPMI containing 10% FCS and 50 µM 2-ME.
Physical Appearance:
Sterile Filtered White lyophilized (freeze-dried) powder.
Protein Content:
Protein quantitation was carried out by two independent methods
1. UV spectroscopy at 280 nm using the absorbency value of 0.213 as the extinction coefficient for a 0.1% (1mg/ml) solution. This value is calculated by the PC GENE computer analysis program of protein sequences (IntelliGenetics).
2. Analysis by RP-HPLC, using a standard solution of IL-18 as a Reference Standard.
Usage:
Denovo Biotechnology's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Patent Rights:
The Sale of recombinant Rat IL-18 by Denovo Biotechnology is prohibited in the following countries: United States, Japan, United Kingdom, France, Spain, Italy, Germany, Austria, Belgium, Denmark, Portugal, Sweden, Switzerland, Liechtenstein, Australia, Taiwan, Netherlands, Korea and Canada.
